期刊
EUROPEAN POLYMER JOURNAL
卷 49, 期 3, 页码 601-612出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2012.12.002
关键词
Nanogel; Gamma radiation; Polyvinylpyrrolidone; Template; pH-sensitive; Interpolymer complex
资金
- International Atomic Energy Agency (IAEA) [15470/R1]
Polymeric pH-sensitive hydrogel nanoparticles (nanogels) of narrow size distributions were directly prepared by gamma radiation-induced polymerization of acrylic acid (AAc) in an aqueous solution of polyvinylpyrrolidone (PVP) as a template polymer. The driving force of PVP/PAAc nanoparticles formation was attributed to the complexation between PAAc (proton-donor) and PVP (proton-acceptor) through the hydrogen bonding interaction. In addition to the hydrogen bonding interaction between the components, the nanoparticles are further stabilized by covalent bonds as a result of the radiation-induced crosslinking process. Particle size and swellability of the prepared nanogels can be controlled by feed composition and concentration, PVP molecular weight as well as irradiation dose, temperature, and atmosphere. The prepared PVP/PAAc nanogel particles were characterized by dynamic light scattering (DLS), viscometry, transmission electron microscopy (TEM) and atomic force microscopy (AFM) techniques. (C) 2012 Elsevier Ltd. All rights reserved.
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